Thepa ea tšepe ea tšepe ha e na alloy low carbon steel.Mokhoa oa tekheniki oa tlhahiso ea liphaephe ke ERW e cheselitsoeng ka seam sa longitudinal.Litekanyetso tsa sehlahisoa li khona ho latela ASTM A500, ASTM A53, ASTM A795, BS1387, BS EN10255, EN 10219, BS 1139, BS 39.